text: def print_rangoli(size):
      width  = size*4-3
      string = ''
  
      for i in range(1,size+1):
          for j in range(0,i):
              string += chr(96+size-j)
              if len(string) < width :
                  string += '-'
          for k in range(i-1,0,-1):    
              string += chr(97+size-k)
              if len(string) < width :
                  string += '-'
          print(string.center(width,'-'))
          string = ''
      for i in range(size-1,0,-1):
          string = ''
          for j in range(0,i):
              string += chr(96+size-j)
              if len(string) < width :
                  string += '-'
          for k in range(i-1,0,-1):
              string += chr(97+size-k)
              if len(string) < width :
                  string += '-'
          print(string.center(width,'-'))
  	
  	
  
  if __name__ == '__main__':
      n = int(input(""))
      print_rangoli(n)
  